[Laszlo-user] LzParam + dataset multiple values issue

[Cary Clark]

I have OL 4.0.12 as reported in the debugger window:
lzx> Debug.write(canvas.lpsversion)
4.0.12.0

I had an issue come up with dynamically adding UI elements via 
replication to a form with the same name and the values not all getting 
sent to the server (Java in my case).  So I constructed a test case.  
Here's a small app that creates an LzParam instance, adds several 
parameters to it via the addValue() method, and submits it to my test 
server code.

===================================================
<?xml version="1.0" standalone="no"?>
<!DOCTYPE canvas SYSTEM "http://www.laszlosystems.com/lps/tools/lzx.dtd">

<canvas>
    <include href="base/submit.lzx" />

    <dataset name="submitDS" src="/common/jsp/echoToStdOut.jsp"
             request="false" type="http"
             timeout="120000" />
   

    <vbox name="content" >
        <hbox name="buttonsView" width="50" spacing="4">
            <button name="submitButton" text="Submit Test" >
                <handler name="onclick">
                    var ds = canvas.submitDS ;
                    var params = new LzParam() ;
                    params.addValue( "supervisorId", "1" ) ;
                    params.addValue( "supervisorId", "2" ) ;
                    params.addValue( "supervisorId", "3" ) ;
                    params.addValue( "supervisorId", "4" ) ;
                    ds.setQueryString( params );
       
                    Debug.write( "testSubmit.lzx::onclick:  
queryString:" + params.toString() ) ;
                    ds.doRequest();
                </handler>
            </button>
        </hbox>           
    </vbox>
   
</canvas>
===================================================
The test jsp is a small hack of the "echo" JSP that someone @ Laszlo 
Systems did some years back.  Instead of returning the values as XML, I 
write them to std out:
<?xml version="1.0"?>
<%@ page import="java.util.*" %>
<%@ page contentType="text/xml; charset=UTF-8" %>

<%
    System.out.println( "echoToStdOut.jsp:  Submitted Parameters" ) ;

      Enumeration params = request.getParameterNames();
         while(params.hasMoreElements()) {
         String n = (String)params.nextElement();
         String[] v = request.getParameterValues(n);
         for(int i = 0; i < v.length; i++) {
             String str = v[i];
             // parse query args (URLENCODING) to Unicode as UTF8
             byte p[] = str.getBytes("8859_1");
             String ustr = new String(p, 0, p.length, "UTF-8");

             System.out.print("name='" + n + "' <");
             System.out.print(ustr);
             System.out.println(">");
            }
        }
%>
===================================================

running the OL app with debug=true, I see this in the debug window when 
the button is clicked:

testSubmit.lzx::onclick:  
queryString:supervisorId=1&supervisorId=2&supervisorId=3&supervisorId=4

According to the OLdoc for LzParm->addValue(), this is correct - "Adds a 
value. Does not replace existing entries with the same name."

The output from the JSP, unfortunately, tells a different story:
echoToStdOut.jsp:  Submitted Parameters
name='supervisorId' <1>

This acted the same way under 4.0.11.  Have I misinterpreted how this 
should work or is this a bug?

Thanks,
Cary